Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Santiago to Seoul

+12h

Santiago

CLSTSOURCE

Chile · UTC-03:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Seoul

KST

South Korea · UTC+09:00

HH12

MM00

(next day)00:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Santiago

Seoul

12:00 AM

12:00 PM

2:00 AM

2:00 PM

4:00 AM

4:00 PM

6:00 AM

6:00 PM

8:00 AM

8:00 PM

10:00 AM

10:00 PM

12:00 PM

12:00 AM+1

2:00 PM

2:00 AM+1

4:00 PM

4:00 AM+1

6:00 PM

6:00 AM+1

8:00 PM

8:00 AM+1

10:00 PM

10:00 AM+1

Green rows indicate typical business hours (9 AM - 5 PM)

CLST and KST on the World Map

The map below highlights the CLST (Chile Standard Time) and KST (Korea Standard Time) timezone regions across the globe.

CLST Zone

→

KST Zone

Explore all world timezones interactively →

CLT – Chile Standard Time

UTC-04:00

Chile Standard Time (CLT) is the time zone for continental Chile, 4 hours behind UTC.

Countries in CLT

Chile

Major Cities in CLT

SantiagoValparaísoConcepciónViña del MarAntofagasta

Key Facts about CLT

•Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer.
•Santiago is the largest city in Chile with over 6 million in the metro area.
•Chile spans over 4,300 km from north to south but uses one timezone.

Daylight Saving:Yes – switches to CLST

Learn more about CLT on Wikipedia

KST – Korea Standard Time

UTC+09:00

Korea Standard Time (KST) is the time zone for South Korea, 9 hours ahead of UTC.

Countries in KST

South KoreaNorth Korea

Major Cities in KST

SeoulBusanIncheonDaeguDaejeonPyongyang

Key Facts about KST

•South Korea does not observe daylight saving time.
•Seoul is home to Samsung, LG, and Hyundai headquarters.
•KST is the same offset as JST (UTC+09:00).

Daylight Saving:No – UTC+09:00 year-round

Learn more about KST on Wikipedia

About Seoul

Wikipedia

Seoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.

Population:9.7 million

Metro:25.5 million

Business Hours:9:00 AM - 6:00 PM KST

Currency:KRW (₩)

Stock Exchange:KRX (Korea Exchange)

Key Landmarks

Gyeongbokgung PalaceN Seoul TowerBukchon Hanok VillageDongdaemun Design PlazaCheonggyecheon Stream

Did You Know?

Seoul has the fastest average internet speed in the world.

Learn more about KST timezone →

Santiago vs Seoul: Offsets, DST and Best Call Times

Santiago runs on Chile Summer Time (CLST) at UTC-03:00, currently observing daylight saving time. Seoul runs on Korean Standard Time (KST) at UTC+09:00. That puts Santiago 12 hours ahead of Seoul — a difference of +12h at the current offsets.

In practice, when it is 9:00 AM in Santiago it is 9:00 PM in Seoul. Midnight in Santiago is 12:00 PM in Seoul.Santiago observes daylight saving time while Seoul does not, so the gap narrows or widens by an hour part of the year.

Santiago to Seoul time conversion table

Santiago (CLST)	Seoul (KST)	Day
12:00 AM	12:00 PM	same day
6:00 AM	6:00 PM	same day
7:00 AM	7:00 PM	same day
8:00 AM	8:00 PM	same day
9:00 AM	9:00 PM	same day
12:00 PM	12:00 AM	next day
3:00 PM	3:00 AM	next day
5:00 PM	5:00 AM	next day
6:00 PM	6:00 AM	next day
9:00 PM	9:00 AM	next day

Why people convert Santiago to Seoul time

Scheduling a call from Santiago to Seoul: a 10:00 AM start in Santiago lands at 10:00 PM in Seoul, so you can confirm the slot without doing the arithmetic yourself.
Handling a +12h gap: Santiago and Seoul have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Seoul is 9:00 PM in Santiago.
Coordinating a Santiago-based team with Seoul contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.

Always state the zone abbreviation, not just the hour. "3:00 PM CLST" is unambiguous; "3 PM" across a +12h gap is not.
With a +12h gap there is no shared 9-to-5 window, so alternate the early start: one week Santiago takes the early slot, the next week Seoul does.
Santiago: Clocks fall back on Sun, Apr 4, 2027. Re-check this page after that date because the offset changes and so does the +12h gap.

About CLT (Chile Standard Time)

Chile Standard Time (CLT) is the standard time in Chile. During summer months (October to March), Chile switches to Chile Summer Time (CLST, UTC-03:00). Chile is the longest north-south country in the world.

About KST (Korea Standard Time)

Korea Standard Time (KST) is the time zone used in South Korea. It shares the same UTC offset as Japan Standard Time but is a distinct time zone. South Korea does not observe daylight saving time. Seoul, the capital, is a major global tech and business hub.

Best time to call between Santiago and Seoul

With a +12h offset there is no overlap inside a normal 9 AM – 5 PM day. Seoul opens at 9:00 AM KST, which is 9:00 PM in Santiago, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Santiago and Seoul have no shared working hours because of the +12h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Santiago is 12 hours ahead of Seoul (CLST UTC-03:00 → KST UTC+09:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Santiago

☀ Currently in DST

Standard: UTC-04:00 · DST: UTC-03:00

Clocks fall back on Sun, Apr 4, 2027

Seoul

Does not observe DST

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Santiago and Seoul?

Santiago (CLST, UTC-03:00) is 12 hours ahead of Seoul (KST, UTC+09:00). The gap is currently +12h.

How do I convert Santiago time to Seoul time?

Add +12h to Santiago local time. For example, 9:00 AM in Santiago is 9:00 PM in Seoul.

What time is it in Seoul right now?

Seoul uses KST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +12h offset from Santiago.

What is the best time to call Seoul from Santiago?

There is no shared working-hours window because of the +12h gap. The closest option is 1:00 PM in Santiago, which is 1:00 AM in Seoul.

Which is ahead, Santiago or Seoul?

Santiago is 12 hours ahead of Seoul. When it is 12:00 PM in Santiago it is 12:00 AM in Seoul.

Do Santiago and Seoul use different time zones?

Santiago (Chile) uses CLST at UTC-03:00, while Seoul (South Korea) uses KST at UTC+09:00. The IANA identifiers are America/Santiago and Asia/Seoul.

Does daylight saving time affect the Santiago–Seoul difference?

Yes at the moment: Santiago is on daylight saving time and Seoul is not, so the +12h gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Santiago's time zone?

CLST also covers Santiago, Valparaíso, Concepción, Viña del Mar, Antofagasta.

Which countries use CLST, Santiago's zone?

CLST is used in Chile.

Is there a day difference between Santiago and Seoul?

Sometimes. The +12h gap is large enough that 8:00 PM or later in Santiago already falls on the next day in Seoul.

What is the time difference between Santiago and Seoul?

Seoul is +12h from Santiago.

What timezone is Santiago in?

Santiago operates on its local timezone.

What timezone is Seoul in?

Seoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.

What are the business hours in Seoul?

Standard business hours in Seoul are 9:00 AM - 6:00 PM KST.

Which countries use CLT (Chile Standard Time)?

CLT is used in Chile.

Does CLT observe daylight saving time?

Yes, CLT switches to CLST during summer months.

What are some interesting facts about CLT?

Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer. Santiago is the largest city in Chile with over 6 million in the metro area.